Cutter-head.



A. B. LANDIS.

CUTTER HEAD.

APPLICATION FILED AUG. 26, 1909.

1,017,882. Patented Feb. 20,1912.

2 SHEETSSHEBT 1.

lV/TNESSES: INVENTOR.

I WQM, I I I, BMW M A. B. LANDIS.

CUTTER HEAD. APPLICATION FILED AUG. 26, 1909.

Patented Feb,20, 1912.

2 SHEETS-SHEET 2.

' sliding ABRAHAM B. LANDIS, OF WAYNESIBORO, PENNSYLVANIA.

CUTTER-HEAD.

To all whom it may concern:

1 Be it known that I, ABRAHAM B. LANDIS, a citizen of the UnitedStates,-residing at Waynesboro, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements inCutter- Heads, of which the following is a specification. o

My said invention consists in various improvements in the details ofconstruction and arrangement of parts of cutter-heads for cuttingscrew-threads on bolts, etc., whereby a structure is provided which isvery rigid in its support of the cutters forming the die and alsowherein a constant flow of oil onto the work is provided through thecutter-holders, cured, all as will be hereinaftermore fully describedand claimed.

Referring to the accompanying drawings which are made a part hereof andon which similar reference characters indicate similar parts, Figure 1is a front elevation, or face view,- of a cutter-head comprising my saidinvention a portion of the rim on one side of said head being brokenaway to illustrate the interior construction more clearly, Fig. 2 a lon'tudinal section looking in the direction indicated by the arrows fromthe dotted line 2-2 in Fig. 1, Fig. 3 a detail section on the dottedline 3 3 in Fig. 1, Fig. 4 a detail view of one of the cutter-holdersseparately, Fig. 5 a detail section on the dotted line 5-5 in Fig. 1,and Fig. 6 a detail front elevation showlng a left-hand cutter-holder inposition.

In .said' drawings the portions marked A represent the body of the head,B the cutterholders, C the chaser, gr cutters, and D a ring mounted onthecasing A and carrying the seats for the supporting andadjusting-devices for the cutter-holders. The body A is a casting ofsuitable form and dimensions for the purpose, adapted to be mounted upona head or disk A on the .outer end of the machine spindle A Said body isformed with a central opening and has longitudinal perforations arrangedequidistant around said opening to receive the trunnions of thecutter-holders and serve as bearings therefor.

The cutter-holders B are suitably shaped blocks formed with recesses ontheir faces to receive the chasers and each is mounted on one side of acylindrical trunnion B of a size and form to fit into one of theperfora- Specification of Letters Patent.

and other advantages se-' Patented Feb. 20, 1912.

Application filed August 26, 1909. Serial No. 514,793.

tions provided therefor in the body A. The body of each holder B extendsto one side of the axis of its trunnion and is mounted to carry thechaser tangential to the work. The chasers C are each secured to thecutterholders B by a clamping plate 0 and a clamping screw 0 extendingthrough said clamping plate into the body of said holder B, the inneredge of said clamping plate engaging with a recess in the outer cornerof the chaseradjacent to its seat upon said holder. The inner edge ofsaid. chaser is formed with a tapered outer corner adapted to fit underan overhanging tapered flange on said holder. The longitudinaladjustment of said chaser is effected by-means of a screw 0 mounted in alongitudinal recess in the holder B with its outer face extendingthrough the face of said holder and engaging with screw-threads in theback of said chaser. This construction and arrangement of thecutter-holder and chaser is, as will be seen, the same as more fullyshown and described in my application No. 458,381, filed October 19,1908. Each of the said trunnions B of said holders is formed with alongitudinal central perforation b which, at the outer ends, adjacent tothe cutterholders, terminate in a branch running at an angle toward thecenter of the head and out through the inner side of the cutter-holder,being arranged to discharge onto the face of the chaser adjacent to the.work. The inner ends of said perforations b are enlarged and have apacking ring 6 therein between which and the inner end of the enlargedsection is mounted a coiled spring 6 arranged to force said packing ringtightly against the face of the head A, against which the inner end ofsaid trunnion abuts.

An oil ring A is mounted on the machine.

spindle A adjacent to said head A and has a circular recess a thereinwhich communicates through perforations a, in the head and theperforations in the packing rings 7) with the perforations b. An oilsupply tube a is connected with said ring A communicating with saidrecess ato furnish a supply of oil, which flows through said circularrecess a around said ring and through the several perforations a intothe longitudinal perforations b in the several trunnions B and outthrough the diagonally extending branches thereof onto the face of thechasers, thus keeping a constant flow of oil upon the work.

engages with a screw-thread in jacent part of ring D In the inner cornerof the outside edge of each holder B is formed a recess and seattoreceive one end of a toggle lever 10. The outer end of said toggle leveris mounted in an adjustable seat 11 in the inner end of a radialperforation extending through ring D. A pin 12 screw-threaded in asleeve 13 is mounted in said radial perforation. Said sleeve 13 isexteriorly screw-threaded and the inner end of said radial perforation.The outer end of the socket is enlarged to accommodate -a pinion 15formed on the outer end of sleeve .13 and a nut 14 is mounted on theouter end of pin 12 adjacent tothe outer end of sleeve 13 to fill theouter end of said socket.

. The ring D is formed on a sleeve mounted to slide longitudinally uponthe body A havin a circumferential groove 01 in which a shifting fork(not shown) operating it longitudinally of saidbody. In the outer rearedge of said ring D is formed -a recess and in said recess is mounted aring 'D having horizontal flanges d on its inner edge extending throughslots in the adand formed with teeth on their inner edges to engage withthe teeth of the pinions 15. 'Said ring D is secured in position byscrews (Z which have short cylindrical points adapted to engage with acircumferential groove (Z in the outer face of said ring D". A pinion 20is mounted in a radial socket in the rim of ring D the teeth of whichengage with the teeth of one of the flanges d of the ring D. In theouter end of said pinion is formed a slot for engagement with ascrew-driver, by which said pinion may be turned, and, through itsconnection with the ring D, turn all of the pinions 15, so as to adjustthe relative radial position of the seats 11 for the outer ends of thetoggle levers 10. By this arrangement the support for the cutterholdersis arranged to hear at a point to one side of the axis on which saidcutter-holder is supported at the extreme outer end of saidcutter-holder so that its support will be rigid and directly in linewith the axis of the work, thus providing a die that will not yieldunder the strain of the work while supporting the chasers in a. positiontangential with the work.

Ihe ring D is secured from circumferen tial movement on the body A. bymeans of a key a set into the body to project therefrom and adapted toengage with a key-way formed in said ring. In the position shown in lFi1 said key engages with a key-way (Z enit is desired to change thecutterhead from a right-hand cutter, as shown in Fig. 1, to a left-handcutter, as shown in Fig. 6, it will be necessary to rotate ring D tobring the seats for the outer ends of the toggle-pins 10 in line withthe outer ends of may engage for to aese I the left-hand cutter-holders.To accomplish this the right-hand cutter-holders B are first removedfrom the head A, the ring D is slid forward on the body far enough topass off the key 03* when said ring may be turned to bring .the key-wayd in line with said key a in which position it may be slid back ontosaid body and thus secured in position to bring the supports for theouter ends of the toggle-pins in proper position for the left-hand die.

The cutter-holders are secured in posit-ion by means of spring mountedkeepers b mounted in. sockets in the trunnions of said cutter-holders oncoiled springs b and adapted to engage a circumferential groove in theinterior of each of the hearings in the body A. Said groove and keeperbeing tapered on the side adjacent to the cutterholder, the springbehind said keeper will act to draw the trunnion back into its bearingand hold the holder against a shoulder 2) adapted to bear upon the outerend or face of the body surrounding said bearing. A screw 6 with aconical end is mounted in a longitudinal perforation in the'trunnion andadapted to engage by its pointed inner end with a counter-sunk recess inthe side of the keeper, by means of which the same may be withdrawn fromthe groove by forcing the screw inward, thus releasing the engagementand permitting the cutter-holder to be withdrawn.

Having thus fully described my said invention, what I clalm as new anddesire to secure by Letters Patent, is: i

1. In a cutter-head, the combination of the body, a series ofcutter-holders mounted on trunnions in perforations around. the axis ofsaid body, a sliding ring on said body, and toggle-pins each mountedwith one end in a seat at the inner end of a cutter-holder opposite thecutting point and the other end in a seat carried by said sliding ring,substantially as set forth.

2. In a cutter-head, the combination of the body, a series ofcutter-holders mounted to rock on trunnions in bearings formed in saidbody around its axis, a sliding ring mounted on said body, radial seatsadjust ably mounted in said ring surrounding said cutter-holders each ofsaid cutter-holders being formed with a seat in its outsidesubstantiallyin line with said adjustable seats holder and at its otherend in a seat in said sliding ring, substantially as set forth.

3. In a cutter-head, the combination of the body, cutter-holdersprovided withrocking trunnions mounted in bearings around the axis ofsaid body each of said trunnions and the holder thereon being formedwith a longitudinal perforation extending from the inner end of thetrunnionout through the cutter-holder with its discharge point adjacentto the work, an oil supply pipe communicating with a circumferentialrecess in the supporting part adjacent to the inner ends of saidtrunnions, and means for supporting and adjusting said cutter-holderstoopen and close the die, substantially as set forth.

' 4. A cutter-head comprising a body, outter-holders with theirtrunnions mounted in longitudinal perforations in said body around itsaxis and formed with perforations extending longitudinally through saidtrunnions from their ends and at an angle through the cutter-holders tobring their point of discharge adjacent to the Work, and a stationarypart mounted on the spindle connected with an oil supply and formed witha circumferential recess and arranged to communicate throughperforations with the inner ends of the perforations in the trunnions ofsaid cutter-holder, substantially as set forth.

5. A cutter-head comprising a body, a ring mounted thereon by which thedie is opened and closed, cutter-holders and cutters' composing the die,supports for said cutter-holders interposed between seats carried bysaid ring and seats in said cutterholders, said ring being secured onthe body by a sliding connection with different circumferential engagingpoints, substantially as set forth.

6. A cutter-head comprising a body, movable cutter-holders, a slidingring by which the die is opened and closed supports for saidcutter-holders interposed between said ring and cutter-holders, saidring being formed with a multiplicity of engaging pointscircumferentially spaced, and a part on said body adapted to engage witheither of said points as said ring is turned to register therewith,substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Waynesboro,Pennsylvania this 25th day of August, A. D. nineteen hundred and nine.

ABRAHAM B. LANDIS. 1,. 8.]

Witnesses:

T. S. CUNNINGHAM, S. G. CUNNINGHAM.

